Granted Patent
Utility
US 4,447,183 · App. 06/295,333
Machine parts expander hold down
Inventor:
Fred W. Yunt
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Aug 24, 1981
Inventor
Fred W. Yunt
Assignee (at issue)
Northrop Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.